Elliptic blending model: A new near-wall Reynolds-stress turbulence closure

Elliptic blending model: A new near-wall Reynolds-stress turbulence closure

Manceau, R.
Hanjali?, K.

Applied Sciences

Multi-Scale Physics

2001-11-14

A new approach to modeling the effects of a solid wall in one-point second-moment (Reynolds-stress) turbulence closures is presented. The model is based on the relaxation of an inhomogeneous (near-wall) formulation of the pressure–strain tensor towards the chosen conventional homogeneous (far-from-a-wall) form using the blending function ?, for which an elliptic equation is solved. The approach preserves the main features of Durbin’s Reynolds-stress model, but instead of six elliptic equations (for each stress component), it involves only one, scalar elliptic equation. The model, called “the elliptic blending model,” offers significant simplification, while still complying with the basic physical rationale for the elliptic relaxation concept. In addition to model validation against direct numerical simulation in a plane channel for Re? = 590, the model was applied in the computation of the channel flow at a “real-life” Reynolds number of 106, showing a good prediction of the logarithmic profile of the mean velocity.

turbulence
channel flow

http://resolver.tudelft.nl/uuid:9cb2c3d3-988b-45a9-a09b-607f0baa6b66

https://doi.org/10.1063/1.1432693

American Institute of Physics

1070-6631

http://link.aip.org/link/PHFLE6/v14/i2/p744/s1

Physics of Fluids, 14 (2), 2002

Institutional Repository

journal article

(c) 2002 Manceau, R.; Hanjali?, K.; American Institute of Physics